Development of inorganic/organic-based diluted magnetic semiconductors for spin-polarized transistors

用于自旋极化晶体管的无机/有机基稀磁半导体的开发

• 批准号: 288222-2007
• 负责人: Chang, GapSoo
• 金额: $ 1.23万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=395733
• 关键词: Development; inorganic; organic; based; diluted; Development; inorganic; organic; based; diluted

There is no doubt that progress in the semiconductor electronics has impacted immensely on our standard of living in the past 30 years. This rapid growth has been driven by scaling a variety of electronic devices. However, it was recently predicted that traditional semiconductor electronics will face fundamental limitations in near future. When the device scaling goes below around 10 nm (65 nm at present), a reliable information processing is known to be impossible due to the quantum behavior of electrons. To overcome this problem and attain further progress, spin-electronics (or spintronics) utilizing both spin-dependent and charge-dependent electric currents has been intensively exploited as a promising alternative to the semiconductor technology relying only on the binary states of electric current (bit of 1 or 0). I am proposing this research program to produce new ferromagnetic semiconductors which is a key element in spin-electronics. The spin is an intrinsic property of electrons which can be manifested as two distinguishable magnetic-energy states (spin-up and spin-down). The conventional semiconductor-based electronics have utilized only the charge degree of freedom (positive holes and negative electrons) without considering the spin properties of charge carriers because ferromagnetism is absent in currently available semiconducting materials. Therefore spintronics technology requires new semiconductors which show ferromagnetic behavior and thus allow a current of spin-polarized electrons to be generated and controlled, and preserve the spin-coherence over long time and distance in an existing semiconductor structure. The incorporation of magnetism into organic-and inorganic-based semiconducting materials will be attempted using the magnetic-impurity doping method. This work on ferromagnetic semiconductors and their abilities to transport the spin-polarized electrons will facilitate the realization of future spintronic devices, including spin-transistors, magnetic memory, logic-circuits working both in magnetic and electric fields.

毫无疑问，在过去30年中，半导体电子产品的进展对我们的生活水平产生了巨大影响。这种快速增长是通过缩放各种电子设备来驱动的。但是，最近可以预测，传统的半导体电子设备将在不久的将来面临基本限制。当设备缩放量在10 nm（目前65 nm）左右以下时，由于电子的量子行为，已知可靠的信息处理是不可能的。为了克服这个问题并取得进一步的进步，使用自旋依赖性和依赖电荷的电流的自旋电子（或旋转三位型）被强烈利用是仅依靠电流二元状态（位1或0）的半导体技术的有希望的替代方法。我建议该研究计划生产新的铁磁半导体，这是自旋电子学的关键要素。自旋是电子的内在特性，可以表现为两个可区分的磁能状态（旋转和旋转）。常规的半导体电子产品仅利用了电荷的自由度（正孔和负电子），而无需考虑电荷载体的自旋特性，因为当前可用的半导体材料中没有铁磁性。因此，Spintronics技术需要新的半导体，这些半导体显示出铁磁行为，因此可以生成和控制自旋极化电子的电流，并在现有的半导体结构中长时间和距离保留自旋连续性。将尝试使用磁性掺杂方法将磁性掺入有机和基于无机的半导体材料中。这项关于铁磁半导体及其运输自旋偏振电子的能力的工作将有助于实现未来的自旋设备，包括自旋晶体管，磁性记忆，逻辑电路，在磁场和电场中工作。